Opaque mat with ribbed pattern



FIG. 1 is a side view of the opaque mat with ribbed pattern, the rightside view of the figure is representative of the top plan view in FIG.2;

FIG. 2 is a top plan view thereof;

FIG. 3 is an enlarged detail view of area 3 circumscribed within or onFIG. 1; and,

FIG. 4 is an enlarged detail view of area 4 circumscribed within or onFIG. 2.

The portions of the opaque mat with ribbed pattern shown in broken linesform no part of the claimed design.

CLAIM The ornamental design for an opaque mat with ribbed pattern, asshown and described.